Beryl
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Pronunciation
- bur'l
Noun
- Beryl is a mineral of pegmatite deposits. It is one of the most beautifully crystalline of minerals, and forms valuable gemstones. The transparent dark green variety is emerald, pink is morganite, and blue is aquamarine. Common beryl is an ore of beryllium.
Chemical composition
- Beryllium aluminum silicate, <math>Be_3AL_2Si_6O_18<math>
Physical properties
- Moh's Hardness: 8.0
- Specific gravity: 2.6-2.8
- Color: White, blue, yellow, green, pink
- Luster: Glassy, transparent to subtranslucent
- Fracture: Conchoidal
- Cleavage: Poor basal
- Habit: Hexagonal - Dihexagonal bipyramidal
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